Given a 5 by 5 game
When I toggle the cell at (2, 3)
Then the grid should look like
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--X--
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When I toggle the cell at (2, 4)
!-- This will be ignored 
Then the grid should look like
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--X--
--X--
When I toggle the cell at (2, 3)
Then the grid should look like
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--X--
